Antonyms of noun propriety

1 sense of propriety

Sense 1
propriety, properness, correctitude -- (correct or appropriate behavior)
       Antonym of impropriety (Sense 1)
      => impropriety, improperness -- (an improper demeanor)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun propriety

1 sense of propriety

Sense 1
propriety, properness, correctitude -- (correct or appropriate behavior)
       => demeanor, demeanour, behavior, behaviour, conduct, deportment -- ((behavioral attributes) the way a person behaves toward other people)